body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    margin: 0;
    padding: 20px;
    background-color: #f5f5f5;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

h1 {
    text-align: center;
    color: #333;
    margin-bottom: 30px;
}

.section {
    margin-bottom: 30px;
    padding: 20px;
    border: 1px solid #eee;
    border-radius: 4px;
}

h2 {
    margin-top: 0;
    color: #666;
    font-size: 1.2em;
}

input[type="text"],
select,
textarea {
    width: 100%;
    padding: 8px;
    margin-bottom: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    box-sizing: border-box;
}

textarea {
    height: 100px;
    resize: vertical;
}

button {
    background-color: #4CAF50;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    margin-right: 10px;
}

button:hover {
    background-color: #45a049;
}

button:active {
    background-color: #3d8b40;
}

.buttons {
    display: flex;
    gap: 10px;
}

#modelList {
    margin-bottom: 10px;
}
